(19)
(11) EP 0 249 324 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.02.1990 Bulletin 1990/08

(43) Date of publication A2:
16.12.1987 Bulletin 1987/51

(21) Application number: 87303910.1

(22) Date of filing: 30.04.1987
(51) International Patent Classification (IPC)4: H01J 17/64, H01J 19/32, H01J 21/00
(84) Designated Contracting States:
DE FR GB SE

(30) Priority: 12.05.1986 US 862122

(71) Applicant: Litton Systems, Inc.
Beverly Hills California 90210-9990 (US)

(72) Inventor:
  • True, Richard Brownell
    Sunnyvale California 94087 (US)

(74) Representative: Godsill, John Kenneth et al
Haseltine Lake & Co. Hazlitt House 28 Southampton Buildings Chancery Lane
London WC2A 1AT
London WC2A 1AT (GB)


(56) References cited: : 
   
       


    (54) High-power switch


    (57) A high-power switch tube (10) is shown constructed from a plurality of electron guns each having a cathode (12) and an anode (32). Between the cathode and anode is mounted a shadow grid (22) closest to the cathode beyond which is mounted a control grid (26), a screen grid (28), and, in some applications, a suppressor grid (30). Each anode (32) is formed with an anode cavity (34) having an opening (36) that is smaller in dimension than the largest dimension of the cavity, thus forming a Faraday cage collector which prevents secondary emission problems.






    Search report